Abstract: An outdrive engine enclosure having at least one sidewall forming a closed end and an open mouth opposite the closed end is disclosed. The enclosure includes a transom ligature constrictably coupled circumferentially about the at least one sidewall proximate the open mouth, and also includes at least one neck ligature constrictably coupled circumferentially about the at least one sidewall, between the open mouth and the closed end. The outdrive engine enclosure further includes a deployed configuration, where the at least one sidewall proximate the open mouth is constricted by the transom ligature around one of a transom mounting rim and a gimbal housing to form a transom seal that is substantially watertight. The deployed configuration also includes the at least one sidewall being constricted by the at least one neck ligature against the outdrive engine proximate a neck, thereby reducing the volume contained inside the enclosure in the deployed configuration.